Allied Telesis AR Series Hardware Reference Manual page 76

76
Figure 35: Pin wiring diagram for an RS-232 DCE transition cable to an AMPLIMITE 50-way connector.
D50 SCSI-2 Male
(to router)
Connect to backshell
←
→
←
→
→
→
→
←
Pin 1
Pin 26
D50 SCSI-2 Male — Pin View
Notes:
(1) → Output from router; ← Input to router.
(2) Use shielded cable with twisted pairs, e.g. UL2789 28AWG. Twisted pairing must be
1-26, 2-27, 3-28, etc.
(3) D25 connector shells to be metallised and fully shielded 360°.
(4) Standard cable length is 2.05m ± 0.05m.
(5) Ferrite must be fitted to cable no more than 25mm from rear of D50 SCSI-2 backshell.
(6) Cable version 4.0.
Cable Shield
RD 2
TD 12
CTS 3
RTS 14
DTR 13
SG 1
RL 15
TCG 20
DSR 4
FGND 21
FSELA 22
Pin 25
Ferrite
Pin 50
D25 Female
Insulating
Sheath
1
2
3
4
5
6
7
8
15
17
20
Pin 13
Cable
Pin 25
D25 Female — Pin View
AR Router
(to DTE)
Shield
TD (103)
RD (104)
RTS (105)
CTS (106)
DSR (107)
SG (102)
CD (109)
TC (114)
RC (115)
DTR (108)
Pin 1
Pin 14
A50R232C
C613-03031-01 REV E